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From "Hadoop QA (JIRA)" <j...@apache.org>
Subject [jira] Commented: (PIG-1438) [Performance] MultiQueryOptimizer should also merge DISTINCT jobs
Date Wed, 09 Jun 2010 07:01:14 GMT

    [ https://issues.apache.org/jira/browse/PIG-1438?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12876980#action_12876980
] 

Hadoop QA commented on PIG-1438:
--------------------------------

+1 overall.  Here are the results of testing the latest attachment 
  http://issues.apache.org/jira/secure/attachment/12446652/PIG-1438_1.patch
  against trunk revision 952098.

    +1 @author.  The patch does not contain any @author tags.

    +1 tests included.  The patch appears to include 3 new or modified tests.

    +1 javadoc.  The javadoc tool did not generate any warning messages.

    +1 javac.  The applied patch does not increase the total number of javac compiler warnings.

    +1 findbugs.  The patch does not introduce any new Findbugs warnings.

    +1 release audit.  The applied patch does not increase the total number of release audit
warnings.

    +1 core tests.  The patch passed core unit tests.

    +1 contrib tests.  The patch passed contrib unit tests.

Test results: http://hudson.zones.apache.org/hudson/job/Pig-Patch-h7.grid.sp2.yahoo.net/334/testReport/
Findbugs warnings: http://hudson.zones.apache.org/hudson/job/Pig-Patch-h7.grid.sp2.yahoo.net/334/artifact/trunk/build/test/findbugs/newPatchFindbugsWarnings.html
Console output: http://hudson.zones.apache.org/hudson/job/Pig-Patch-h7.grid.sp2.yahoo.net/334/console

This message is automatically generated.

> [Performance] MultiQueryOptimizer should also merge DISTINCT jobs
> -----------------------------------------------------------------
>
>                 Key: PIG-1438
>                 URL: https://issues.apache.org/jira/browse/PIG-1438
>             Project: Pig
>          Issue Type: Improvement
>          Components: impl
>    Affects Versions: 0.7.0
>            Reporter: Richard Ding
>            Assignee: Richard Ding
>             Fix For: 0.8.0
>
>         Attachments: PIG-1438.patch, PIG-1438_1.patch
>
>
> Current implementation doesn't merge jobs derived from DISTINCT statements. The reason
is that DISTINCT jobs are implemented using a special combiner (DistinctCombiner). But we
should be able to merge jobs that have the same type of combiner (e.g. merge multiple DISTINCT
jobs into one).

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